선배senior; veteran 우선priority; preference 대선배senior; veteran 선생teacher; instructor 선약prior appointment 선진being advanced 선진국advanced country; developed country 여선생female teacher 우선first of all; to begin with; before everything 우선적priority

출발departure; leaving 출발선starting line 출발역departure station 출발점starting point 출발지point of departure 폭발outburst 개발development; exploitation 개발비development expense 발견discovery; detection 발급issue

군대military; troops 부대military camp 소방대원fire department 일대party; band; crowd; flock 입대joining an army; enlistment 제대discharge 탐험대expedition; party of explorers 특공대special forces 함대fleet 해병대marine corps